Date: Tue, 28 Jun 2005 19:04:18 +0930 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-stable@freebsd.org Cc: Michael Schuh <michael.schuh@gmail.com>, Roman Neuhauser <neuhauser@sigpipe.cz> Subject: Re: FreeBSD MySQL still WAY slower than Linux Message-ID: <200506281904.48464.doconnor@gsoft.com.au> In-Reply-To: <20050628092126.GB48140@isis.sigpipe.cz> References: <1dbad315050621051525f4c6fc@mail.gmail.com> <200506211451.j5LEpA2W024350@lurza.secnetix.de> <20050628092126.GB48140@isis.sigpipe.cz>
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--nextPart3602168.TQE5VqBfCS Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tue, 28 Jun 2005 18:51, Roman Neuhauser wrote: > No you don't. You want to make a side-by-side comparison > of two products, and if one of them underperforms, it just > underperforms. You cannot use a poor location selection > strategy in the driver as an excuse for poor operation. Why not? It's not a side-by-side comparison if the underlying hardware is different.. I don't think ascribing ALL the poor performance to being on the wrong part= of=20 the disk is putting your head in the sand, but it DOES make a difference. > In all honesty, I'm getting somewhat irritated by all the > "dd is meaningless performance measurement tool, use something > real" and similar arguments: dd is a real command for real > work, and if it shows abysmal performance of sequential writes, > then there's a problem. dd is a useful start, but you shouldn't read too much into the results sinc= e,=20 in general, dd doesn't reflect real world usage patterns. There are some people who seem to want to ignore the results and shoot them= =20 down with bland assertions about how poorly the tests have been run. There= =20 are also people doing crappy tests, however there IS a middle ground where = I=20 think most reasonable people are sitting - they want decent tests, and have= a=20 good attitude to fixing the problems. =2D-=20 Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C --nextPart3602168.TQE5VqBfCS Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (FreeBSD) iD8DBQBCwRm45ZPcIHs/zowRAlKUAJsEJoQuUwQoyZCyuYde3JcGJgJluQCdEL8Y Nj77+PjQAZdjV8NaTN11u4I= =jvhk -----END PGP SIGNATURE----- --nextPart3602168.TQE5VqBfCS--
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